• Winter vegetables are the main source of spring vegetables. Therefore, it is very important to do a safe winter. Pouring frozen water at an appropriate time is an important part of safe wintering. It can not only supply the water needed for winter seedlings of vegetables and return to the green stage, but also keep the soil moist and the soil temperature relatively stable. The main technical points are as follows: ? First, seize the timing of winter irrigation. Pre-flooding before thawing has the advantage of increasing the moisture in the soil, increasing the temperature of the soil, protecting the vegetable roots from the threat of drought during the winter, and at the same time reducing land cracks; According to local experience, it is best to irrigate the earth as soon as it freezes and during the day when it freezes. It takes place from about mid-November to mid-November. The water is poured into the ground for a suitable period of time, and the water can be sealed immediately afterwards. Premature irrigation with high temperature will not only reduce the cytoplasmic concentration of seedlings, but also reduce the cold resistance. Moreover, the ground will not freeze, and the evaporation will be too large. After the winter, the loss of loquat will be too much, and the winter irrigation will not be effective; the winter irrigation will be too late. If the temperature is too low, the moisture does not easily infiltrate after being frozen, and the overwintering vegetables will last too long under the ice, which will make the vegetables prone to hypoxia. If the weather turns warm after irrigation, it must be refilled before freezing. Second, the amount of water should be large. Winter irrigation of vegetables is the last water before winter, so the amount of water should be larger. However, attention should be paid to preventing flooding and flooding, avoiding flushing, pressing, flooding, silting, and damaging seedlings. Third, a few things that need attention: ? 1, watering frozen water depends on soil quality, topography and soil moisture to control flexibility. ? 2. For the low-lying black clay land, or for the autumn rain, the soil with good soil moisture, there is no need for irrigation, or too much water, it may also be dead. ? 3, clay soil frozen water, prone to cracking, can be covered in the frozen water after some dry soil or horse dung, etc., this will not only prevent cracking, but also conducive to soil conservation. ? 4, if it is saline-alkali land, should be filled earlier, the water should be slightly larger. China Agricultural Network Editor
